//
//  UIColor+Util.m
//  Peanut
//
//  Created by Jim huang on 2018/3/12.
//  Copyright © 2018年 Jim_Peanut. All rights reserved.
//

#import "UIColor+Util.h"

@implementation UIColor (Util)

+ (UIColor *)colorWithRGBHex:(UInt32)hex
{
    int r = (hex >> 16) & 0xFF;
    int g = (hex >> 8) & 0xFF;
    int b = (hex) & 0xFF;
    
    return [UIColor colorWithRed:r / 255.0f
                           green:g / 255.0f
                            blue:b / 255.0f
                           alpha:1.0f];
}

+ (UIColor *)colorWithHexString:(NSString *)stringToConvert
{
    NSString *cString = [[stringToConvert stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];
    
    // String should be 6 or 8 characters
    if ([cString length] < 6) {
        return [UIColor clearColor];
    }
    
    // strip 0X if it appears
    if ([cString hasPrefix:@"0X"])
        cString = [cString substringFromIndex:2];
    if ([cString hasPrefix:@"#"])
        cString = [cString substringFromIndex:1];
    if ([cString length] != 6)
        return [UIColor clearColor];
    
    NSScanner *scanner = [NSScanner scannerWithString:cString];
    unsigned hexNum;
    if (![scanner scanHexInt:&hexNum]) return nil;
    return [UIColor colorWithRGBHex:hexNum];
}


//渐变色图层
+ (CAGradientLayer *)setGradualChangingColor:(UIView *)view fromColor:(UIColor *)fromColor toColor:(UIColor *)toColor{
    //    CAGradientLayer类对其绘制渐变背景颜色、填充层的形状(包括圆角)
    CAGradientLayer *gradientLayer = [CAGradientLayer layer];
    gradientLayer.frame = view.bounds;
    //  创建渐变色数组，需要转换为CGColor颜色
    gradientLayer.colors = @[(__bridge id)fromColor.CGColor,(__bridge id)toColor.CGColor];
    //  设置渐变颜色方向，左上点为(0,0), 右下点为(1,1)
    gradientLayer.startPoint = CGPointMake(0, 0.5);
    gradientLayer.endPoint = CGPointMake(1, 0.5);
    //  设置颜色变化点，取值范围 0.0~1.0
    gradientLayer.locations = @[@0,@1];
    
    return gradientLayer;
}




@end
